The 807CMK Mechanical flow meter has a large easy to read display, flow ports can be positioned vertically or horizontally, UL/cUL listed, handles fluid of any viscosity, rated for Gasoline, Diesel, Kerosene, mineral spirits, Stoddard solvents and heptane. Fill-Rite meters provide precision and durability in a cost-effective design. The 807CMK is a 3-wheel mechanical meter designed for transfer pumps with a flow rate of 5 to 20 GPM. this meter has a 3/4 in. inlet and outlet. In package, pipe fittings to fit all 3/4 in. outlet pumps